781983488 has 144 divisors (see below), whose sum is σ = 1882131552. Its totient is φ = 319488000.

The previous prime is 781983481. The next prime is 781983523. The reversal of 781983488 is 884389187.

It is a super-2 number, since 2×781983488² = 1222996351009292288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (781983481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1500668 + ... + 1501188.

It is an arithmetic number, because the mean of its divisors is an integer number (13070358).

Almost surely, 2^781983488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 781983488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (941065776).

781983488 is an abundant number, since it is smaller than the sum of its proper divisors (1100148064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

781983488 is a wasteful number, since it uses less digits than its factorization.

781983488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602 (or 588 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 56.

The square root of 781983488 is about 27963.9676727034. The cubic root of 781983488 is about 921.2960184118.

The spelling of 781983488 in words is "seven hundred eighty-one million, nine hundred eighty-three thousand, four hundred eighty-eight".